Magnetic-Field-Induced Magnetic Phase Transitions Associated with Ferroelectricity in Multiferroic ErMn2O5

被引：5

作者：

Kimura, Hiroyuki ^{[1
]}

Wakimoto, Shuichi ^{[2
]}

Fukunaga, Mamoru ^{[1
]}

Noda, Yukio ^{[1
]}

Kaneko, Koji ^{[2
]}

Metoki, Naoto ^{[2
]}

Kakurai, Kazuhisa ^{[2
]}

Kohn, Kay ^{[3
]}

机构：

[1] Tohoku Univ, Inst Multidisciplinary Res Adv Mat, Sendai, Miyagi 9808577, Japan

[2] Japan Atom Energy Agcy, Ibaraki 3191195, Japan

[3] Waseda Univ, Dept Phys, Tokyo 1698555, Japan

来源：

JOURNAL OF THE PHYSICAL SOCIETY OF JAPAN | 2009年 / 78卷 / 03期

关键词：

multiferroics; colossal magnetoelectric effect; neutron diffraction under magnetic field; magnetic phase transition; ferroelectricity; rare-earth magnetic moment;

D O I：

10.1143/JPSJ.78.034718

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

Microscopic magnetic properties under the application of a magnetic field were investigated in multiferroic ErMn2O5 using neutron diffraction. Below T = 8 K upon applying a magnetic field along the c-axis, an incommensurate-commensurate-incommensurate magnetic phase transition occurred. On the contrary, when the magnetic field was applied parallel to the a-axis, no phase transition occurred up to H = 5 T. H-T phase diagrams obtained in the present study show a one-to-one correspondence with H-T phase diagrams for previously obtained dielectric properties, indicating that the field-induced dielectric transition was triggered by magnetic phase transition. The contrastive phase diagram between H || c and H || a suggests that the induced Er3+ magnetic moment contributed significantly to the magnetic and dielectric responses to the magnetic field.

引用

页数：5

共 23 条

[21] Magnetoelectric effect and field-induced 'incommensurate-homogeneous' phase transitions in EuMn2O5 [J].